Vegeta

Vegeta (ベジータ, Bejīta), or Prince Vegeta is the prince of the fallen Saiyan race and arch-rival to Goku . He is the husband of Bulma, the father of Trunks and Bulla , the estranged brother of Tarble , and the great-great grandfather of Vegeta Jr. Aside from Goku, Gohan, and Piccolo, he is easily one of the most prominent characters in the series, receiving more character development after being introduced than a number of other characters. He was once a young member of the Saiyan Army under the Planet Trade Organization , but after his race's demise, he worked alongside Nappa and Raditz , directly under Frieza .
He later joins the Z Fighters while battling along side them on Namek, and returns to Earth with them as well, where he remains for the rest of his life. As with almost all Saiyans, Vegeta's name is a pun off of vegetables, and in the case, most of the word itself, "vegetable."